My advice really any time you see a plan that you want to get ,you should pull the trigger ASAP because the only constant is change. As beams fill up, new plans are introduced, old plans retired, you will see different plans at different times. You will be grandfathered into any plan you are on. Just be aware that if you make a change, go onto hibernation/vacation mode you'll only be able to change to the currently available options.

That's all well and good, but I just upgraded my plan a couple of months ago to the next one I could afford. Next year I will be able to afford the next upgrade. Can't pull the trigger on the top plan if you can't afford it, not only do plans change, being able to afford it changes also. Seems the options that are there should stay there.